| // Copyright John Maddock 2008 |
| |
| // Use, modification and distribution are subject to the |
| // Boost Software License, Version 1.0. |
| // (See accompanying file LICENSE_1_0.txt |
| // or copy at http://www.boost.org/LICENSE_1_0.txt) |
| |
| #include <boost/math/concepts/real_concept.hpp> // for real_concept |
| #include <boost/math/special_functions/sign.hpp> |
| |
| #include <boost/test/test_exec_monitor.hpp> // Boost.Test |
| #include <boost/test/results_collector.hpp> |
| #include <boost/test/unit_test.hpp> |
| #include <boost/test/floating_point_comparison.hpp> |
| |
| #include <iostream> |
| using std::cout; |
| using std::endl; |
| using std::setprecision; |
| |
| template <class RealType> |
| void test_spots(RealType /*T*/, const char* /*type_name*/) |
| { |
| // Basic sanity checks. |
| RealType a = 0; |
| RealType b = 1; |
| RealType c = -1; |
| BOOST_CHECK_EQUAL((boost::math::signbit)(a), 0); |
| BOOST_CHECK_EQUAL((boost::math::sign)(a), 0); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(1)); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1)); |
| a = 1; |
| BOOST_CHECK_EQUAL((boost::math::signbit)(a), 0); |
| BOOST_CHECK_EQUAL((boost::math::sign)(a), 1); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(1)); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1)); |
| a = -1; |
| BOOST_CHECK((boost::math::signbit)(a) != 0); |
| BOOST_CHECK_EQUAL((boost::math::sign)(a), -1); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(-1)); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(-1)); |
| a = boost::math::tools::max_value<RealType>(); |
| BOOST_CHECK_EQUAL((boost::math::signbit)(a), 0); |
| BOOST_CHECK_EQUAL((boost::math::sign)(a), 1); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(1)); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1)); |
| a = -boost::math::tools::max_value<RealType>(); |
| BOOST_CHECK((boost::math::signbit)(a) != 0); |
| BOOST_CHECK_EQUAL((boost::math::sign)(a), -1); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(-1)); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(-1)); |
| if(std::numeric_limits<RealType>::has_infinity) |
| { |
| a = std::numeric_limits<RealType>::infinity(); |
| BOOST_CHECK_EQUAL((boost::math::signbit)(a), 0); |
| BOOST_CHECK_EQUAL((boost::math::sign)(a), 1); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(1)); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1)); |
| a = -std::numeric_limits<RealType>::infinity(); |
| BOOST_CHECK((boost::math::signbit)(a) != 0); |
| BOOST_CHECK_EQUAL((boost::math::sign)(a), -1); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(-1)); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(-1)); |
| } |
| #if !defined(__SUNPRO_CC) && !defined(BOOST_INTEL) |
| if(std::numeric_limits<RealType>::has_quiet_NaN) |
| { |
| a = std::numeric_limits<RealType>::quiet_NaN(); |
| BOOST_CHECK_EQUAL((boost::math::signbit)(a), 0); |
| BOOST_CHECK_EQUAL((boost::math::sign)(a), 1); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(1)); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1)); |
| a = -std::numeric_limits<RealType>::quiet_NaN(); |
| BOOST_CHECK((boost::math::signbit)(a) != 0); |
| BOOST_CHECK_EQUAL((boost::math::sign)(a), -1); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(-1)); |
| BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(-1)); |
| } |
| #endif |
| } |
| |
| |
| int test_main(int, char* []) |
| { |
| // Basic sanity-check spot values. |
| // (Parameter value, arbitrarily zero, only communicates the floating point type). |
| test_spots(0.0F, "float"); // Test float. OK at decdigits = 0 tolerance = 0.0001 % |
| test_spots(0.0, "double"); // Test double. OK at decdigits 7, tolerance = 1e07 % |
| #ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS |
| test_spots(0.0L, "long double"); // Test long double. |
| test_spots(boost::math::concepts::real_concept(0), "real_concept"); // Test real_concept. |
| #else |
| std::cout << "<note>The long double tests have been disabled on this platform " |
| "either because the long double overloads of the usual math functions are " |
| "not available at all, or because they are too inaccurate for these tests " |
| "to pass.</note>" << std::cout; |
| #endif |
| |
| return 0; |
| } // int test_main(int, char* []) |
| |